Shock-absorber.



G. 'SWAN.

SHOGK ABSORBER.

APPLICATION FILED in. 22, 1909.

.Ratented July 5, 1910.

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To all wlwm it my concern:

Be it known that I, CHARLES Swan, a citizen of the United States, residing at Corry, in the county of Erie and State of Penn sylvania, have invented new and useful Improvements in Shock-Absorbers, of which the following is a specification.

This invention relates 'to shock absorbers and consists in certain improvements in the construction thereof as Wlll be. hereinafter fully described and pointed out in the claim.

It is thought desirable in such vehicles as automobiles, that the ordinary springs be allowed full play under normal conditions, and that the shock absorbers only act with an excess of movement of the springs, or in other words when an excess shock takes place.

' One of the objects of the invention is to provide a shock absorber that will act in this way. i 7

Other objects of the invention will appear from the specification and claim.

The invention is illustrated panying drawings as follows:

Figure shows a side elevation of 'a fragment of the vehicle frame, spring .and axle, the "axle being in section, and the shock absorber in place. Fig. 2 is a section on .the line 22 in Fig. 3. Fig. 3 is a plan view of the device. H in Fig. 2.

1 marks the sill of the vehicle; 2 the spring 'and 3 the axle. A cylinder 4 is sccured'to the sill in any desired manner, alug or bracket 4? being provided for this purpose. One end of thiscylinder has the inwardly extending flange 5, and theopposite end is screw threaded and provided with a nut 6; A spring 7 is arranged in the cylinder, and is under normal tension when the-nut 6 is in place. A spring 8 is preferably nested within the spring 7. A washer? is arranged against the flange 5 and a washer 10 against the nut 6. These washers form bases for the springs. A rod 11 extends through the cylinder and springs. It is provided with a sleeve 12 at one end, forming a shoulder on the rod, and an extension 13 also forms a shoulder on the rod. The distance between these shoulders can be adjusted by means of the screw thread on the end of the rod op erating in the sleeve 12.

- It will be observed that if the rod 1s forc1- bly moved in either direction it will coinpress the spring. Thus if the rod is moved towa rd the right the shoulder l2 will engage Specification of Letters Patent. Application filed January 22, 1909. Serial No. 413,673,

in the accom-' Fig. 4 is a section on the line the washer 9, and'will carry with it' the washer 9 and thus compress the spring While on the other hand if moved toward the left the shoulder formed by the extension 13 will engage the washer l0,a nd carry the washer l0 withit, thus compressing the springs.

The extension 13 is connected with a link -14 by means of the bolt 15. The link extends into the throat 16 ofthe arm 17 of a bell crank lever 18. The link is secured in the throat by the bolt 19. The opposite arm Patented July 5,1910.- y

20 of. the bellcrank lever isprovidedwith the eye. bolt'21. A rod 22 extends through this eye bolt. It is provided with the shoulders 23 and 24: so distanced as to permit of a' normal play of the spring 2 -without engaging the eye bolt. The rod 22 is secured to. the axle by any convenient clamp. As shown it is secured by the clamp 25 in which the rod forms a part.

1 In operation when the vehicle is subj ected bell crank lever moves the rod 11 either in onedirection or they other depending on the direction of the shock, thus compressing the springv and absorbing the shock. The distance betweenthe shoulders 23 and 24 is such, that the normal operation of the -to severe shock one of the shoulders 23 or 24: engages the eye bolt and operating on the spring 2 is not interfered with. Asshown in Fig. 1, the spring 2 is compressed, and the shoulder 24 is inengagement with the bell crank lever, while in Fig. 2 the springs are in normal position.

' It is some times desirable to secure the cylinder. with the lug or bracket 45* extending under the sill or over the sill as distinguished from beingsecured at the side as shown in the drawings. I therefore make the bracket 27 on which the bell crank lever is mounted adjustable. The bracket is carried by a split ring 28. A bolt 29 extends through the ring, so that it can besecurel y clamped on the cylinder 4. The cylinder 4. is provided withthe key ways 30 into which the bolt 29 extends, so as to assist the clamping action in -locking the bracket in place. These key ways 30 are arranged at different points on the cylinder, so as to permit of difi'erent attachments to the cylinder with relation to the. bracket, so that the cylinder maybe secured to'difi'erent parts of the sill. I also prefer to split the end of the cylinder 4. as at 31, so that the clamping of the ring 28 lOPliS the out 6 in adjustment.

What I claim asnew isi In a shock absorber, the combination oi a cylinder; means for attachment to an axle and a vehicle body, one of said means being in the form of a bracket on'said cylinder; a

second bracket on the cylinder, one of said brackets on the'cylinder being adjustable;

' 1 supports. at each end of the cylinder for recerving the end thrust of the spring; a bell crank leverseoured to the second of said brackets on the cylinder; a rod'extending through the spring; devices on the rod for engaging each end of the spring; a conneo:

tion between the rod-and the bell crank lever; fand a connection between the bell crank lever and the other of said means comprising a rod having shoulders thereon-and 'slidinglyconnected with the bell crank le ver, said-shoulders being spaced to engage the bell orank'lever only wlth an excess of Rom. J. Osnomm,

CLARAIPETTENGIIL.

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